
Blue Mountain forms a formidable physical barrier across this landscape, pierced only by significant geologic notches like Wind Gap and Smith Gap. The era's transportation network is defined by the heavy rail influence of the Lehigh and New England and the Delaware Lackawanna and Western railroads, which serviced the industrial operations at Pen Argyl and the slate production at Chapman Quarries.
125 named features on this map. Tap any name to fly to it.
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7 editions found
1890 · Easton
USGS Topo · 1:62,500
1891 · Easton
USGS Topo · 1:62,500
1891 · Delaware Water Gap
USGS Topo · 1:62,500
1893 · Delaware Water Gap
USGS Topo · 1:62,500
1894 · Allentown
USGS Topo · 1:62,500
1902 · Slatington
USGS Topo · 1:62,500
1914 · Wind Gap
USGS Topo · 1:62,500
1916 · Wind Gap
USGS Topo · 1:62,500
1919 · Pocono
USGS Topo · 1:62,500
1921 · Pocono
USGS Topo · 1:62,500